Power tool battery



FIG. 1 is a front, left, top perspective view of a power tool battery showing our new design;

FIG. 2 is a back, right, bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is an enlarged view of the encircled area 9 of FIG. 1 ; and,

FIG. 10 is an enlarged view of the encircled area 10 of FIG. 3 .

The broken lines shown on the drawings depict portions of the power tool battery that form no part of the claimed design. 

CLAIM The ornamental design for a power tool battery, as shown and described. 